I've used previous versions of iceenhancer for Steam's GTAIV with no problems. I just tried this on 2 different Windows 7 machines: Did a clean install, disabled updates, ran the 1040 patch, then copied all 2.1 files into the GTAIV directory. Unfortunately I am getting the old "RGSC cannot start! RGSC must present and running to run" error shortly after entering my login info in the RGSC splash screen (!). I also tried a manual install of RGSC 1.1.1.3. THEN, when I went to look in the GTAIV folder here:
C:\Program Files (x86)\Steam\steamapps\common\Grand Theft Auto IV
Everything but two folders, GTAIV and Installers, is gone! Among other things, there are no LaunchGTA or GTA exe files to be found! I'm obviously doing something wrong. I'd love to see 2.1 in action now that I have a 2GB card. Thanks in advance!